Home / 85,350.25-128,037.54-45,358.81

Finding the Fourth Proportional to 85,350.25, 128,037.54 and 45,358.81

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Solution

The fourth proportional to 85,350.25, 128,037.54 and 45,358.81 is: 68,044.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,350.25 : 128,037.54 = 45,358.81 : x
  2. Step 2: Convert to fraction form
    85,350.25/128,037.54 = 45,358.81/x
  3. Step 3: Cross multiply
    85,350.25x = 128,037.54 × 45,358.81
  4. Step 4: Simplify right side
    85,350.25x = 5,807,630,449.73
  5. Step 5: Solve for x
    x = 5,807,630,449.73/85,350.25
  6. Step 6: Final answer
    x = 68,044.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.